Schneider 18638 | NG125 – circuit breaker – NG125N – 3P – 50A – C curve

Technical Specifications

• Manufacturer: Schneider Electric

• Product Name: NG125N Circuit Breaker

• Reference Number: 18638

• Number of Poles: 3P (Three Pole)

• Rated Current: 50 Amperes

• Tripping Curve: C Curve

• Rated Voltage: Up to 400/415V AC

• Breaking Capacity: Typically up to 25kA (depends on model variant and standard)

• Standard Compliance: IEC/EN 60947-2

• Mounting: DIN rail or backplate mounting

• Terminal Type: Screw terminals

• Operating Frequency: 50/60 Hz

• Degree of Protection: IP20 (when installed inside a proper enclosure)

• Dimensions: Standard modular width (usually 6 modules for 3P)

• Mechanical Life: Up to 20,000 operations

• Electrical Life: Up to 10,000 operations

Key Features

1. High Breaking Capacity
   Designed to interrupt high short-circuit currents safely without damaging the circuit breaker or the installation.

2. C Curve Tripping
   Suitable for general-purpose loads with moderate inrush currents such as motors, transformers, and lighting systems.

3. Reliable Three-Pole Design
   Offers protection across all three phases, ensuring balanced disconnection in case of fault.

4. Robust and Durable Construction
   Built to withstand harsh conditions in industrial environments with long mechanical and electrical lifespan.

5. Flexible Mounting Options
   Can be easily installed on DIN rails or backplates, making it suitable for various panel designs.

6. Visible ON/OFF Indicator
   Allows for easy identification of the breaker’s status for maintenance and operation.

7. Accessory Compatibility
   Compatible with a wide range of accessories such as auxiliary contacts, shunt trips, and under-voltage releases.

8. Certified Quality
   Complies with international standards (IEC/EN 60947-2), ensuring safety and performance.

Applications

• Industrial Electrical Panels
  Ideal for heavy-duty protection in industrial machinery, equipment, and large power panels.

• Commercial Buildings
  Used to protect circuits in office buildings, shopping malls, and data centers.

• Power Distribution Boards
  Suitable for main or sub-distribution boards in medium to large electrical systems.

• Motor Control Centers (MCCs)
  Provides protection for motor feeders and associated control circuits.

• Renewable Energy Systems
  Can be integrated into the electrical protection of solar PV arrays and other renewable systems.

• Infrastructure Projects
  Used in electrical installations for airports, hospitals, factories, and utilities.